Ruby | Array none?() function

Ruby | Array rindex() function

Last Updated : 06 Dec, 2019

Array#rindex() : rindex() is a Array class method which returns the index of the last object in the array.

Syntax: Array.rindex() Parameter: Array Return: the index of the last object in the array. if not present then nil

Example #1 :

Ruby

# Ruby code for rindex() method

# declaring array
a = [18, 22, 33, nil, 5, 6]

# declaring array
b = [1, 4, 1, 1, 88, 9]

# declaring array
c = [18, 22, 50, 6]

# rindex method example
puts "rindex() method form : #{a.rindex(22)}\n\n"

puts "rindex() method form : #{b.rindex(1)}\n\n"

puts "rindex() method form : #{c.rindex(18)}\n\n"

Output :

rindex() method form : 1

rindex() method form : 3

rindex() method form : 0

Example #2 :

Ruby

# Ruby code for rindex() method

# declaring array
a = ["abc", "nil", "dog"]

# declaring array
c = ["cat", nil]

# declaring array
b = ["cow", nil, "dog"]


# rindex method example
puts "rindex() method form : #{a.rindex("abc")}\n\n"

puts "rindex() method form : #{b.rindex("cat")}\n\n"

puts "rindex() method form : #{c.rindex("cat")}\n\n"

Output :

rindex() method form : 0

rindex() method form : 

rindex() method form : 0

Ruby | Array none?() function

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